Whilst your brain may explode from their incredibly green website (yes, even greener than this one), Green Drinks International are a group of people who work in the environmental field that meet up for a beer at informal sessions known as Green Drinks.
Currently active in 244 cities worldwide, according to their website “These events are very simple and unstructured, but many people have found employment, made friends, developed new ideas, done deals and had moments of serendipity. It’s a force for the good and we’d like to help it spread to other cities. Contact your local node to get the latest info about coming along.”
There are plenty of press articles (“Stories”) to read, and a guide to the next meeting in your area. Why not take a look at Green Drinks International?